Ascend Refrigeration

Updated 08/13/08 - Page 1 of 46-

Ascend Refrigeration Jimex Corporation Service Manual

JFD - Full Door Upright Reach-ins Covers Ascend Units: JFD-23R JFD-23F JFD-48R JFD-48F JFD-72R


Ascend Refrigeration Jimex Corporation Service Manual

JFD - Full Door Upright Reach-ins Covers Ascend Units: JFD-23R JFD-23F JFD-48R JFD-48F JFD-72R Ascend Refrigeration Jimex Corporation 1575 Zephyr Avenue Hayward, CA 94544 Phone: 1-800-314-4477 Local: 510-477-3400 Fax: 510-477-3412 Web Site: www.ascendmfg.com Web contact: [email protected]


<<<NOTE: This manual is intended solely for the use of licensed refrigeration technicians. Any repairs or alterations made by any person other than a licensed refrigeration technician may void unit warranty. The information contained within is believed to be accurate at time of printing and is subject to change without warning. Please check our website for the most up to date service information.>>> <<<WARNING: Before servicing any electrical component be sure unit is unplugged and there is no power to any component. Always wear proper safety gear, and follow good safety practices. Always reclaim any refrigerant charge in accordance with EPA guidelines.>>>


Table of Contents 1. Exploded Views and Parts List 1-1. JFD-23R: Exploded View, Parts and Price List …………………………… 5 - 8 1-2. JFD-23F: Exploded View, Parts and Price List……………………………. 9 - 12 1-3. JFD-48R: Exploded View, Parts and Price List …………………………… 13 - 16 1-4. JFD-48F: Exploded View, Parts and Price List ……………………………. 17 - 20 1-5. JFD-72R: Exploded View, Parts and Price List …………………………… 21 - 24 2. Wiring Diagrams 2-1. JFD-23R……………………………………………………………………… 25 2-2. JFD-23F……………………………………………………………………… 26 2-3. JFD-48R……………………………………………………………………… 27 2-4. JFD-48F……………………………………………………………………… 28 2-5. JFD-72R……………………………………………………………………… 29 3. Electronic Control, SF-102 - Coolers 3-1. Components…………………………………………………………………. 30 3-2. Electrical Set Up…………………………………………………………….. 31 3-3. Basic Operation…………………………………………………………….. 31 3-4. Changing Settings………………………………………………………….. 31 3-5. Factory Settings…………………………………………………………….. 32 3-6. Troubleshooting the SF-102……………………………………………….. 33 4. Electronic Control, SF-104 - Freezers 4-1. Components…………………………………………………………………. 34 4-2. Electrical Set Up…………………………………………………………….. 35 4-3. Basic Operation……………………………………………………………... 35 4-4. Changing Settings………………………………………………………….. 35 4-5. Factory Settings…………………………………………………………….. 36 4-6. Troubleshooting the SF-104……………………………………………...... 37 5. Installing and Replacing Parts 5-1. Opening the top panel…………………………………………………….. 38 5-2. Removing the top panel…………………………………………………… 38 5-3. Electronic control…………………………………………………………… 38 5-4. Door switches………………………………………………………………. 38 5-5. Evaporator coil cover……………………………………………………… 39 5-6 Evaporator fan motor……………………………………………………….. 39 5-7 Defrost heater coil and drain line heater (freezers only)…….. ……….. 40 5-8 Doors………………………………………………………………..………... 40 5-9 Tensioner……………………………………………………………..……… 41 5-10. Gaskets…………………………………………………………….………… 41

5-11 Bottom front grill………………………………………………………….... 41 5-12. Condensing assembly……………………………………………………… 42 5-13. Shelving……………………………………………………………..………. 42

6. Troubleshooting, FAQ’s and Tech information 6-1. Frequently asked questions…………………………………………......... 43 6-2. Table: Amp draw per component……………………………………........ 44 6-3. Table: Compressor tech data and running pressures ………………. 45 6-4. Revision and changes history…………………………………….............. 46


1-1. JFD-23R, Exploded View, Parts and Price List





1-2. JFD-23F, Exploded View, Parts and Price List

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1-4. JFD-48F, Exploded View, Parts and Price List

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2-1. JFD-23R Wiring Diagram

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2-2. JFD-23F Wiring Diagram

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2-4. JFD-48F Wiring Diagram

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3. Electronic Control, SF-102 - Coolers 3-1. Components 3-2. Electrical Set Up 3-2. Basic Operation 3-3. Changing Settings 3-4. Factory Settings 3-5. Troubleshooting

3-1. Components The components of the electronic control for Ascend coolers consist of: (1) Box Sensor (2) SF-102, micro temp control (3) Compressor Relay (4) Transformer

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3-2. Electrical Set up - The electronic control runs off of 12 volts AC, and sends out 12 volts DC. - 120 V AC is converted to 12 V AC by the transformer before entering the control. The output for the compressor (terminal 1 out the back of the control) is 12 V DC. At the compressor relay it is changed to 120 V AC, which powers the compressor.

3-3. Basic Operation

Changing the set point: - To change the set point, press and release the “SET” button. A number will now be flashing on the screen; this number is the set point. - To change the desired set point, simply press the up or the down arrow until the flashing number reads the desired set point. - When the desired set point is flashing on the screen there is no need to do anything further. In a few seconds the flashing set point will be replaced with the solid readout of the current box temperature, and the new set point will be stored in the controller’s memory. - The box will now cycle on and off between the value of the set point and the value of the set point plus the differential. See Section 3-4 for more information. - Allow up to two hours, depending on product loading and ambient temperatures for the unit to reach the new set point. Initiating a manual defrost: - The default settings for the cooler will automatically initiate an off cycle defrost every 12 hours. However, if at any time a one-time manual defrost is desired, simply press and hold the manual defrost button for six seconds. There will be an audible beep and the LED indicator for “defrost” will activate. - At default settings the defrost will last for 30 minutes. At this point the defrost LED indicator will change from solid to indicate “in defrost” to a blinking indicator to indicate that the unit has just come out of defrost. This blinking will continue for 15 minutes. 3-4. Changing Settings

- Press and hold the “SET” button for five seconds, until the control emits an audible beep - release the “SET” button. The display will now show a blinking “E1.” This is the first of the adjustable settings. - To make a change to any setting, press and release either the up or the down arrow until the desired setting is reached. - To move to the next setting press and release the “SET” button. If more than ten seconds go by without any buttons being pressed, the control will save all settings, exit the parameter set-up mode, and go back to reading the box temperature. - To either lock or unlock the parameter set-up mode, press and hold the down arrow while the display is reading box temperature. After ten seconds the control will emit an audible beep and

The electronic control in Ascend coolers is preset for optimal performance from the factory. In most cases the only adjustment that may be desired is changing the set point.

The electronic control in Ascend coolers is preset for optimal performance from the factory, however if you are installing a replacement control, or wish to change defrost settings the default settings will need to be adjusted.

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the display will read “ON,” indicating that settings E1 through C1 can be changed, or “OFF,” indicating that E1 through C1 cannot be modified. 3-5. Factory Settings E1 The lowest value the end user can choose as the set point. E2 The highest value the end user can choose as the set point. E3 The differential. With a set point of 36° and a differential of 7°, the unit will cool until it reaches

36°. At this point, the compressor will then shut off and not come back on until the unit reaches 43° (36 + 7). The unit will cycle on and off between these two temperatures, maintaining an average box temperature half way between.

E4 The compressor start delay is the shortest amount of time between the compressor cycling off and coming back on. It also will delay the compressor from starting when the unit is plugged in.

E5 and E6 will offset the temperatures read by the box and evaporator sensors. This setting is rarely used. F1 The maximum amount of time that a defrost can last. A defrost will last for the value set in F1

or until the evaporator sensor reads the value set in F3. F2 The defrost interval controls how often the unit goes into defrost. A setting of six corresponds

to every six hours, or four times a day. In addition, the first defrost will start an F2 number of hours after the unit is first plugged in.

F3 The defrost termination temperature value will bring the unit out of defrost before the full amount of time set in F1 has been reached if the evaporator sensor ever reaches the value set in F3.

F4 The display during defrost. A setting of “00” will show the current box temperature as it rises during a defrost, while a setting of “01” will lock in the last temperature value before the defrost began.

F5, F6, F7, F8 and F9 are advanced settings and are advised not to be changed. C1 The temperature display units. “00” for Celsius, “01” for Fahrenheit.

SF-102 Solid Door Cooler Factory Settings Description Setting E1 Low set limit, ° 36 E2 High set limit, ° 45 E3 Differential, ° 7 E4 Comp. start delay, minutes 3 E5 Box temp. offset, ° 0 E6 Evap temp. offset, ° 0 F1 Max. defrost duration, minutes 30 F2 Defrost interval, hours 12 F3 Defrost termination, ° 68 F4 Display during defrost 1 F5 Fan operation function 1 F6 Draining time 4 F7 Fan restart after defrost 0 F8 When F7=00 6 F9 When F7=01 0 C1 Temperature units 1

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3-6. Troubleshooting the SF-102 If the unit is not cooling: Is the compressor LED indicator on? - If the set point is higher than the box temperature, the compressor will not come on. If the compressor LED indicator is on, but the compressor is not: - If the box was just plugged in, there will be a compressor start delay (setting E4).

- Check for voltage out of terminal one on the back of the control. The voltage should be 12V DC. - Check for voltage at the compressor relay. There should be 120V AC to the compressor.

If the compressor LED indicator is on, and there is 120V AC out of the compressor relay: - Check operation of compressor. Is the temperature the box sensor reading the true box temperature? - Ohm out the sensor. The sensor should read 28,000Ω at 32°F and 10,000Ω at 77°F. If the unit is too cold: Is the compressor LED indicator on?

- If the set point is lower than the current box temperature, the compressor will stay on until it reaches the set point.

If the compressor LED indicator is not on: - Check for voltage out of terminal one on the back of the control. There should not be voltage if the compressor LED indicator is not lit. - Check for voltage out of the compressor relay. There should not be voltage out of the relay when the compressor LED is not lit.

Is the temperature the box sensor reading the true box temperature? - Ohm out the sensor. The sensor should read 28,000Ω at 32°F and 10,000Ω at 77°F. If the unit is building up ice: Are the defrost settings (F1-F9) set to factory settings? - Check the settings (see 3-3 and 3-4) and reset to factory values if needed. If defrost settings are at factory recommendations: - Verify gasket seals, and product moisture levels.

- If needed, change the frequency or duration of the defrost cycle. Settings F1 - F3 can be changed, call factory for recommendations.

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4. Electronic Control, SF-104 - Freezers 4-1. Components 4-2. Electrical Set up 4-3. Basic Operation 4-4. Changing Settings 4-5. Factory Settings 4-6. Troubleshooting

4-1. Components The components of the electronic control for Ascend freezers consist of: (1) Box Sensor (2) SF-104 micro temp control (3) Compressor Relay (4) Evaporator Fan Relay (5) Transformer (6) Defrost Relay (7) Evaporator Sensor / Box Sensor

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4-2. Electrical Set up - The electronic control runs off of 12 volts AC, and sends out 12 volts DC. - 120 V AC is converted to 12 V AC by the transformer before entering the control. The output for each of the electrical loads (compressor, defrost heaters and fans) is 12 V DC. At the respective relay it is changed to 120 V AC to power the load.

4-3. Basic Operation Changing the set point: - To change the set point, press and release the “SET” button. A number will now be flashing on the screen; this number is the set point. - To change the desired set point, simply press the up or the down arrow until the flashing number reads the desired set point. - When the desired set point is flashing on the screen there is no need to do anything further. In a few seconds the flashing set point will be replaced with the solid readout of the current box temperature and the new set point will be stored in the controller’s memory. - The box will now cycle on and off between the value of the set point and the value of the set point plus the differential (see 4-4 for more information). - Allow up to four hours, depending on product loading and ambient temperatures for the unit to reach the new set point. Initiating a manual defrost: - The default settings for the freezer will automatically initiate a heated defrost every six hours. However if at any time a one-time manual defrost is desired, simply press and hold the manual defrost button for six seconds. There will be an audible beep and the LED indicator for “defrost” will activate. - At default settings, the defrost will last for 30 minutes, or until the defrost termination temperature is reached (see 4-4). At this point the defrost LED indicator will change from a solid light to indicate “in defrost,” to a blinking indicator to indicate that the unit has just come out of defrost. This blinking will continue for 15 minutes. 4-4. Changing Settings

- Press and hold the “SET” button for five seconds, until the control emits an audible beep - release the “SET” button. The display will now show a blinking “E1.” This is the first of the adjustable settings. - To make a change to any setting, press and release either the up or the down arrow until the desired setting is reached. - To move to the next setting, press and release the “SET” button. - If more than 10 seconds go by without any buttons being pressed, the control will save all settings, exit the parameter changing mode, and go back to reading box temperature. - To either lock or unlock the parameter-changing mode, press and hold the down arrow when the display is reading the box temperature. After 10 seconds the control will emit an audible beep

The electronic control in Ascend freezers is preset for optimal performance from the factory. In most cases the only adjustment that will be desired is changing the set point.

The electronic control in Ascend freezers is preset for optimal performance from the factory, however if you are installing a replacement control, or wish to change defrost settings the default settings will need to be adjusted.

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and the display will read “ON,” indicating that settings E1 through C1 can be changed, or “OFF,” indicating that E1 through C1 can not be modified. 4-5. Factory Settings E1 The lowest value the end user can choose as the set point. E2 The highest value the end user can choose as the set point. E3 The differential. With a set point of 0° and a differential of 10°, the unit will cool until it reaches 0°, at this point the compressor will then shut off and not come back on until the unit reaches 10° (0 + 10). The unit will cycle on and off between these two temperatures, maintaining an average box temperature half way between. E4 The compressor start delay is the shortest amount of time between the compressor cycling off and coming back on. It also will delay the compressor from starting when the unit is plugged in. E5 and E6 will offset the temperature’s read by the box and evaporator sensors. This setting is rarely used. F1 The maximum amount of time a defrost can last. A defrost will last for the value set in F1 or

until the evaporator sensor reads the value set in F3. F2 The defrost interval controls how often the unit goes into defrost. A setting of six corresponds to every six hours, or four times a day. The first defrost will start an F2 number of hours after the unit is plugged in. F3 The defrost termination temperature value will bring the unit out of defrost before the full amount of time set in F1 has been reached if the evaporator sensor ever reaches the value set in F3. F4 The display during defrost. A setting of “00” will show the current box temperature as it rises during a defrost while a setting of “01” will lock in the last temperature value before the defrost began. F5, F6, F7, F8 and F9 are advanced settings and are advised not to be changed. C1 The temperature display units “00” for Celsius, “01” for Fahrenheit.

SF-104 Solid Door Cooler Factory Settings Description SettingE1 Low set limit, ° -10 E2 High set limit, ° 20 E3 Differential, ° 10 E4 Comp. start felay, minutes 3 E5 Box temp. offset, ° 0 E6 Evap temp. offset, ° 0 F1 Max. defrost duration, minutes 30 F2 Defrost interval, hours 6 F3 Defrost termination, ° 68 F4 Display during defrost 1 F5 Fan operation function 1 F6 Draining time 4 F7 Fan restart after defrost 0 F8 When F7=00 6 F9 When F7=01 0 C1 Temperature units 1

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4-6. Troubleshooting the SF-104 If the unit is not cooling: Is the compressor LED indicator on? - If the set point is higher than the box temperature, the compressor will not come on. If the compressor LED indicator is on, but the compressor is not on: - If the box was just plugged in, there is a compressor start delay (setting E4).

- Check for voltage out of terminal one on the back of the control. The voltage should be 12V DC. - Check for voltage at the compressor relay. There should be 120V AC to the compressor.

If the compressor LED indicator is on, and there is 120V AC out of the compressor relay: - Check operation of compressor. Is the temperature the box sensor is reading the true box temperature? - Ohm out the sensor. The sensor should read 28,000Ω at 32°F and 10,000Ω at 77°F. If the unit is too cold: Is the compressor LED indicator on?

- If the set point is lower than the current box temperature, the compressor will stay on until it reaches the set point.

If the compressor LED indicator is not on: - Check for voltage out of terminal one on the back of the control. There should not be voltage if the compressor LED indicator is not lit. - Check for voltage out of the compressor relay. There should not be voltage out of the relay when the compressor LED is not lit.

Is the temperature the box sensor reading the true box temperature? - Ohm out the sensor. The sensor should read 28,000Ω at 32°F and 10,000Ω at 77°F. If the unit is building up ice: Are the defrost settings (F1-F9) set to factory settings? - Check the settings (see 4-3 and 4-4), and reset to factory values if needed. How long does the unit stay in defrost? - Initiate a manual defrost (see 4.1) and time how long unit stays in defrost.

- If the unit comes out of defrost right away (less than a few minutes), it is possible that the evaporator/defrost termination sensor is giving bad values to the SF-104, and terminating the defrost prematurely. Ohm out the evaporator sensor.

Are the defrost heater coil and drain line heater operating correctly? - Initiate a manual defrost and check amp draw on the defrost heater coil circuit (see section 6-2 for correct values). Alternatively, drop the evaporator coil cover (see 5-5,) and ohm out the heater coil (see section 6-2 for correct values). - Drop the evaporator coil cover (see 5-5), and check amp draw, and/or ohm value of drain line heater (see section 6-2 for correct values).

If defrost settings are at factory recommendations, and heater coil is operational: - Verify gasket seals, and product moisture levels.

- If needed, change the frequency or duration of the defrost cycle. Settings F1 - F3 can be changed. Call factory for suggestions.

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5. Installing and Replacing Parts 5-1. Opening the top panel

- Remove three Phillips head screws (two from JFD-23 units). - The top panel will now pivot up and out on the two hinges connecting it to the top of the unit.

5-2. Removing the top panel To remove: - Remove the four bolts that attach the two hinges on the top of the unit to the top panel. - After the two top hinges are disengaged, support the top panel while removing the screws as directed in 5-1. To install: - Reverse the above installation steps. 5-3. Electronic control - To gain access to the electronic control, simply follow instructions for opening the top panel as directed in 5-1.

5-4. Door switches

To remove: - Open top panel, see 5-1 above. - Remove three wires from old door switch. - Remove door switch. To install: - Reverse above directions.

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5-5. Evaporator coil cover

To remove: - Remove the screws along the perimeter of the evaporator drain pan. - The evaporator drain pan can now be lifted forward and pulled down.

- The drain pan will still be attached by the evaporator fan motor wiring. - Cut the zip ties attaching the motor wiring to the motors. - Unplug both leads from each evaporator fan motor.

- Pull the drain line heater out from the drain line. - The evaporator coil cover is now freely removable.

To install: - Reverse the above installation steps. NOTE: Be sure the drain line heater does not become bunched up at the start of the drain. 5-6. Evaporator fan motor

To remove: - Follow steps 5-5 above to remove the evaporator coil cover. - Remove four screws to free evaporator fan motor from evaporator coil cover and evaporator fan guard. To install: - Reverse the above directions.

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5-7. Defrost heater coil and drain line heater (freezer only) To remove: - Drop the evaporator coil cover, see 5-5 above. - Remove and replace either the defrost heater coil or the drain line heater. - Cut the two wire leads for the replaced component inside the box, at the heater element. To install: - Remove both the back and top wiring access U-channels. - Push or snake the leads for the replacement heater through the elliptical hole in the back wall of the unit. - Pull the leads tight from the outside back of the box. - Make the replacement connection on the top of the box, discarding the wire leads to the old element. 5-8. Doors

To remove: - Open the top panel, see 5-1. - Remove the screw and washer that attaches the bracket to the tensioner (white arrow). - While supporting the door, remove the three screws that attach the top bracket to the unit (black arrows), removing the middle screw last. - The door will now lift up and off the bottom hinge.

To install: - NOTE: The tensioner works by means of an interior cam. If the door and tensioner are installed incorrectly, the tensioner will act as a spring, trying to open the door, not assist in shutting it. Anytime a door is removed or a tensioner is replaced, care must be taken to reinstall the door and tensioner in the correct orientation.

- Place the door on the bottom hinge. - With the door in the closed position, attach the top hinge to the tensioner/door assembly with one Phillips head screw (black arrow at right). Be sure to attach the hinge in the orientation that is as at a 45° angle to with face of the unit. (See picture at right.) - Attach the tensioner/door/upper hinge assembly to the unit with three Phillips head screw (black arrows above), attaching the middle screw first. - Open the door. There should be a tension force which works to close the door.

NOTE: Picture is of left-hinged door.

NOTE - If the newly-installed tensioner is acting to assist in the opening of the door, it is because either the door or the hinge was installed in the wrong orientation. Remove all screws from the

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upper hinge and tensioner assembly and re-install. making sure to install with the door closed and the hinge as pictured above. 5-9. Tensioner

To remove: - Remove the door as directed in 5-8. - Remove the two screws attaching the tensioner to the door. - With use of leverage, carefully pry the tensioner out of the door cavity.

To install: - Push the new tensioner down into the cavity in the door. - Replace the two screws that were taken out of the old tensioner.

NOTE: The tensioner works by means of an interior cam. If the door and tensioner are installed incorrectly the interior cam of the tensioner will act as a spring, trying to open the door, not assist in shutting it. Any time a door is removed, or a tensioner is replaced, care must be taken to reinstall the door and tensioner in the correct orientation. See above 5-8. “To install:” for the correct procedure to insure correct operation.

5-10. Gaskets

To remove: - Begin at one corner, grab gasket and pull away from door, follow gasket along perimeter of door. To install: - Begin at one corner by pushing the protruding “dart” into the channel in the door, move away from corner, and around the door perimeter, pushing the dart into the channel.

5-11. Bottom front grill

To remove: Remove four Phillips head screws. Lift up and pull forward. To install: Reverse the above directions

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5-12. Condensing assembly - Remove all screws around the perimeter of the bottom back grill, to remove the bottom back grill. - Remove the bottom front grill, see 5-8 above. - Remove the two screws that attach the system deck to the system rails. - The system deck will now slide forward to allow access. - Care must be taken to not stress the refrigerant lines

when sliding the system deck. 5-13. Shelving

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6. Troubleshooting, FAQs and Tech information 6-1. Frequently asked questions What does it mean when “LL” or “HH” is displayed on the electronic control?

- LL and HH are error codes that the control displays when it is reading a temperature that is out of the range it can read: either too low (LL) or too high (HH). In most cases the temperature in the box is in fact not out of range. Instead the sensor is giving the controller bad values. Ohm out the sensor and compare the values to the known values. When LL or HH are displayed on the screen the controller will go into a “fail safe mode” which will run the compressor for 45 minutes on, 15 minutes off. - If both sensors ohm out correctly and there are no loose connections, then there is an internal fault with the controller.

Can I run an Ascend cooler as a freezer, or freezer as a cooler? - No, this is not recommended. This will shorten the life of the compressor by running it outside of the parameters that it was designed for.

The unit does not go into defrost / does not come out of defrost. - If the digital control defrost LED indicator is reading as expected, check the operation of the defrost relay.

The unit is building up ice on evaporator coil. - Check defrost settings, see section 4-3, 4-4 and 4-5. If needed, change defrost settings from factory defaults. - Check gasket seals and product moisture level. - Check operation of defrost heater coil and drain line heater.

Water is leaking inside the unit. / There is ice on the back wall or floor. - During defrost, water is dripping from the evaporator coil cover, usually down the back wall and onto the floor of the unit. - Drop the evaporator coil cover, see section 5-5 and verify that the drain line is clear and un-obstructed. - Check operation of drain line heater. - Pour water into the front area of the evaporator coil cover and verify that there are no leaks, and that the evaporator coil cover drain tube extends into the back wall.

Unit is leaking water outside the unit. - Make sure unit is level. - Remove back cover and verify that drain tube is in place in condensate drain pan. The doors will not shut by themselves.

- Ascend full door coolers and freezers have a “hold open” feature. The doors will not auto close if they are open more than 90°. - If the door is actively springing open the tensioner is installed incorrectly. See 5-8. - If the door is neither actively springing open, nor closing by itself, the tensioner needs to be replaced. See 5-8 and 5-9.

The unit makes loud shaking noises on compressor start up (JFD-72F only). - The CPR valve needs to be adjusted. See 5-14 above.

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6-2. Ohm and amp values per component

Box and Defrost Sensor

Known

Temperature Ω value -4 °F 67,400 32 °F 28,400 77 °F 10,000 80 °F 9,600 90 °F 7,600 Drain Line Heater

Unit Voltage kΩ W Amp draw JFD-23F JFD-48F 120 V 1.98 7.3 0.06

JFD-72F Coming Soon Defrost Heater Coil

Unit Heater Name Ω W Amp draw JFD-23F 500 W @ 120 V 24 -28 550 4 - 5 JFD-48F 800 W @ 120V 14 - 18.0 800 6 -7 JFD-72F Coming Soon

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6-3. Compressor tech data and running pressures

Unit Compressor Cap tube (length /

BC#)

Amount of

charge (oz)

Comp - BTU/hr*

Unit Start amps

Unit Run

amps

JFD-23R 1/3 HP 134a, Tecumseh AEA-4440YXA 60"/BC2 10.25 1829 9.4 8.1 JFD-23F 1/2 HP 404A, Aspera T2155 50"/BC2 14 1407 10.6 8.5 JFD-48R 1/2 HP 134a, Aspera T6213 120"/BC3 23.25 3340 11.6 8.9 JFD-48F 3/4 HP 404A, Aspera T2180GK 60"/BC2 18.3 2837 13.8 9.9 JFD-72R 1/2 HP 134a, Aspera T6215 78"/BC3 27.5 4016 12.6 9.1 JFD-72F Coming Soon

*Compressor BTU/hr values for coolers are taken at a 20°F evaporator coil and 130°F condenser coil. Freezer: at a -20°F evaporator coil, and 130°F condenser coil.

Unit Low Side psi @ 75° ambient**

High Side psi @ 75° ambient**

Low Side psi @ 85° ambient**

High Side psi @ 85° ambient**

JFD-23R 6 105 8 145 JFD-23F 7 175 10 210 JFD-48R 4 115 6 135 JFD-48F 10 200 12 235 JFD-72R 7 110 8 125 JFD-72F Coming Soon

**High and low side pressures are taken at 0°F for freezers (empty box, cycling between -5° and 5°), and 38°F for coolers (empty box, cycling between 35° and 41°), and are taken just before compressor cycles off.

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6-4. Revision and changes history 8/13/2008 - Initial version

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Ascend Refrigeration

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